Answer: y=4
Explanation:
This is a 45-45-90 triangle. It is also a special triangle. The hypotenuse is x√2. X is sommon through all 3 sides. The legs of the triangle are x in length each.
Looking at the picture, we see the hypotenuse is equal to 4√2. We can set this equal to the hypotenuse to find what x is.
4√2=x√2
x=4
Since we know that the legs of the triangle are both equal to x, we knoe that y=4.